Improvement in dental impre ssion-cups



UNITED STATES PATENT OFFICE.

O. B. BUTTLES, OF MILWAUKEE, WISCONSIN.

Specification forming part of Letters Patent No. 55,465, dated J une 12,1866.

To all whom it may concern:

Be it known that I, O. B. BUTTLEs, of Milwaukee, in the county ofMilwaukee and State of Wisconsin, have invented certain new and usefulImprovements in Dental Impression- Oups; and I do hereby declare thatthe following is a full, clear, and exact description of the same,reference being had to the accompanying drawings, makinga part of thisspecification, in which- Figure 1 represents a perspective view of oneof the cups in question, for taking an impression of the upper interiorportion of the mouth, and Fig. 2 represents a section through the same.

A cup for taking an impression of the under interior portion of themouth would vary slightly in form only from that shown, but nothing inprinciple 5 hence I have shown but one form of cup in the drawings.

In the use of the impression-cups as at present constructed the wax orother material is liable to move or slip in removing the cup from themouth, and the consequence is a badlyfitting plate.

The object and purpose of my invention are to prevent this liability ofthe material in which the impression is taken from slipping or moving;and my invention consists in forming a flange or projection on theinside of the cup, which entirely prevents the material from moving inthe cup or marring its entire accuracy.

To enable others skilled in the art to make and use my invention, I willproceed to describe the same with reference to the drawings.

A represents an upper cup, which, in addition to its other usualappliances, I make with a rim, flange, or projection, a, so that the waxor other material used in it cannot, in removing the cup, change itsposition, it beingfirmly held to the cup by the said rim or flange.

By the use of such a cup the impression of the inside of the mouth canbe accurately taken and accurately preserved in removing it from themouth.

b represents the handle by which the cup is placed and manipulated, andc the elevation therein to fit against the root of the mouth.

The cup for taking an impression of the 1111- der portion of the mouthwould vary butlittle in shape or form from that herein shown anddescribed, and need not be further explained.

Having thus fully described my invention, what I claim is- Oombiningwith a dental impression-cup an inner rim or flange, a, for preventin gthe wax or other impressed material from moving or slipping in the cupas the latter is being removed from the mouth, substantially asdescribed.

' O. B. BUITLES. Witnesses:

CHAS. T. HEINEMANN, CHAS. O. RATIINGER.

